Development and Application of Agro-Ecosystem Models

E. Priesack, A. Berkenkamp, S. Gayler, H. P. Hartmann, C. Loos

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Scopus citations

Abstract

Modeling approaches are indispensable tools to integrate current knowledge and available data necessary to estimate the magnitudes of water, carbon, and nitrogen flows within an agricultural landscape section of the type represented by the Klostergut Scheyern. Since all relevant state variables and fluxes with a high enough spatial and temporal resolution can't be monitored, process-based simulation models help to extrapolate available experimental data to understand the sensitivities of complex agricultural production systems, especially in the context of achieving sustainable land use. By extending the agro-ecosystem models to include descriptions of soil-borne N2O production and to consider actual management practices such as erosion protection measures, it is possible to better quantify the risks of atmospheric pollution by N2O emissions and risks of groundwater pollution by nitrate leaching. Water flow and crop growth modeling provided water balances of the root zone, thus providing necessary input data for the hydrological modeling of the watershed Schnatterbach, which includes the Klostergut Scheyern. The applied crop growth models seem to need more sensitivity to soil properties. In particular, root growth models need to be improved. The development and improvement of agro-ecosystem and N-turnover models like Expert-N provide operational integrated knowledge on the dynamics of actual crop production systems, which can be directly applied in decision support systems helping the farmer and his consultant to improve agricultural management and land use practice both ecologically and economically.

Original languageEnglish
Title of host publicationPerspectives for Agroecosystem Management
Subtitle of host publicationBalancing Environmental and Socio-Economic Demands
PublisherElsevier
Pages329-349
Number of pages21
ISBN (Print)9780444519054
DOIs
StatePublished - 2008
Externally publishedYes

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